Abstract
A 74-year-old man was admitted to our hospital with dyspnea and systemic generalized edema. Liver enzymes were slightly elevated and severe anemia was present. The tumor (7cm diameter) in the left lateral segment of liver was revealed at the ultrasonography. Cholangiocellular carcinoma or hemangiosarcoma was suspected from CT images, but after MRI hepatocellular carcinoma, hepatocellular adenoma, metastasis of malignant melanoma or angiomyolipoma was also included in differential diagnosis. Due to huge tumor size and thin peritumor tissue and not to cause tumor cell dissemination, ultrasonographic percutaneal needle biopsy was not performed. At the operation needle biopsy was done. Rapid histological study was reported as hepatocellular adenoma. Left lateral lobectomy of liver was done. There are a few reports about hepatocellular adenoma in Japan. Some of them also had difficulty in differential diagnosis. Needle biopsy during operation should be considered as one of the useful methods to decide the resection area of the liver.
